I've seen something similar before (youtube saying can't play or whatever) and I find just giving it a moment to load something a bit more and then pressing it again or two works....

The can't connect to page/tsl security error does seem like a router problem though.... You've tried some other wifi or your data connection?

I'm having the same problem with mine unable to access any google services even google drive this has been happening since a couple of week ago I'm pretty sure is not router issue because I have a Lumia 640xl and works just fine

I haven't been able to use Google or Youtube on my Lumia 950 XL for the last few weeks now. It either says that "can't connect to the page" or "TSL security error"

I am facing the same problem using my 535 and im sure its not a router issue since i am able to use the site using my android device. I can access the google using UC browser, but not the youtube site. It seems like google are trying to sabotage W10M by blocking all google related services